12172029 has 4 divisors (see below), whose sum is σ = 16229376. Its totient is φ = 8114684.

The previous prime is 12172019. The next prime is 12172049. The reversal of 12172029 is 92027121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12172029 - 2⁵ = 12171997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12172019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2028669 + ... + 2028674.

It is an arithmetic number, because the mean of its divisors is an integer number (4057344).

Almost surely, 2^12172029 is an apocalyptic number.

It is an amenable number.

12172029 is a deficient number, since it is larger than the sum of its proper divisors (4057347).

12172029 is an equidigital number, since it uses as much as digits as its factorization.

12172029 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4057346.

The product of its (nonzero) digits is 504, while the sum is 24.

The square root of 12172029 is about 3488.8435046588. The cubic root of 12172029 is about 230.0316843559.

The spelling of 12172029 in words is "twelve million, one hundred seventy-two thousand, twenty-nine".